材料科学
掺杂剂
钙钛矿(结构)
钝化
光电流
磁滞
兴奋剂
纳米技术
光电子学
化学工程
能量转换效率
量子力学
物理
工程类
图层(电子)
作者
Jing Wang,Xin Wu,Yizhe Liu,Tian Qin,Kaicheng Zhang,Ning Li,Juan Zhao,Ruquan Ye,Zhanxi Fan,Zhenguo Chi,Zonglong Zhu
标识
DOI:10.1002/aenm.202100967
摘要
Abstract Developing low‐cost, efficient, and stable dopant‐free hole‐transporting materials (HTMs) in perovskite solar cells (PVSCs) is essential to their commercial deployment. Herein, the synthesis of a novel spirofluorene‐dithiolane based small molecular HTM, SFDT‐TDM, through facile and low‐cost synthetic routes is reported. The CH … π interactions in adjacent SFDT‐TDM are beneficial for high hole mobility and the methylthio groups in SFDT‐TDM can serve as Lewis bases to passivate the defects on the surface of perovskite films, leading to suppressed non‐radiative recombination and enhanced charge extraction at the perovskite/HTM interface. As a result, Cs x FA 1− x PbI 3 based PVSCs with SFDT‐TDM as the HTM realize champion power conversion efficiencies (PCEs) of 21.7% and 20.3% for small‐area (0.04 cm 2 ) and large‐area (1.0 cm 2 ) devices with negligible photocurrent hysteresis, respectively. Additionally, all‐inorganic CsPbI 3− x Br x based PVSCs with SFDT‐TDM demonstrate an impressive PCE of 17.1% along with excellent stability. This work highlights the great potential of the spirofluorene core for exploring low‐cost and dopant‐free HTMs for PVSCs with high efficiency and stability.
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